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Estrus induction in anestrous mixed-breed goats using the "female-to-female effect"
MedLine Citation:
PMID:  23135982     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A trial was conducted during the anestrous period in female goats to determine: (a) whether estrus can be induced in anestrous goats by administration of equine chorionic gonadotropic hormone (eCG) and PGF(2α) under pen conditions and (b) whether these sexually active female goats can elicit sexual arousal in sexually inactive bucks. One hundred and fifteen pluriparous, nonlactating mixed-breed female goats were randomly assigned to one of four treatment groups: (1) administration of a single dose of 240 IU of eCG, 50 μg PGF(2α) i.m., and 25 mg progesterone (P(4)) (eCG; n = 30); (2) administration of P(4) and exposure to female goats treated with eCG-PGF(2α) (P(4); n = 39); (3) administration of 0.5 ml saline and P(4) (Sal; n = 23); and (4) P(4) plus exposure to female goats treated with saline (Con; n = 23). After hormone administration, all goats were put together with adult sexually inactive bucks for 15 days. The percentage of goats in estrus during these 15 days was similar in eCG-treated animals and untreated animals exposed to the eCG animals (97 and 95 %). Pregnancy rate was also similar (63 vs. 64 %) between these two groups. eCG-treated goats exhibited estrus earlier (P < 0.05) than the treated goats in contact with the eCG goats. Furthermore, eCG-treated goats had larger litters (1.9 ± 0.2 vs. 1.6 ± 0.1, P < 0.05) than the untreated goats in contact with the eCG goats. These results show that fertile estrus can be induced in anestrous female goats by exposing them to female goats induced to estrus with eCG. This female-female interaction triggers the stimulation cycle leading to the sexual arousal of bucks.
Authors:
Rafael Rodríguez-Martínez; Oscar Angel-García; Juan Manuel Guillén-Muñoz; Pedro Antonio Robles-Trillo; Maria de Los Angeles De Santiago-Miramontes; Cesar Alberto Meza-Herrera; Miguel Mellado; Francisco Gerardo Véliz
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-8
Journal Detail:
Title:  Tropical animal health and production     Volume:  -     ISSN:  1573-7438     ISO Abbreviation:  Trop Anim Health Prod     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  1277355     Medline TA:  Trop Anim Health Prod     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Universidad Autónoma Agraria Antonio Narro, Periférico Raúl López Sánchez y Carretera a Santa Fe, C.P. 27054, Torreón, Coahuila, Mexico.
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